Thirty years (and one day) ago, Mount St. Helens blew its top. Or rather, its side. After months of heightened seismic activity, a 5.1 magnitude earthquake caused the flank of the mountain to suddenly ...
It was a quiet Sunday morning, at 8:32 a.m., 38 years ago when Mount St. Helens blew its top, sending tons of ash into the sky. The volcano had been quiet since the 1850s, but in 1980, geologists were ...
Sunday marks the anniversary of the May 18, 1980, volcanic eruption that rocked the Northwest. Geologist Carolyn Driedger recounts the haunting day before that catastrophic event — and its lasting ...
This article was published in Scientific American’s former blog network and reflects the views of the author, not necessarily those of Scientific American I'm still going through the USGS image ...
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